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List of common physics notations
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List of common physics notations : ウィキペディア英語版
List of common physics notations
This is a list of common physical constants and variables, and their notations. Note that bold text indicates that the quantity is a vector.
==Latin characters==


| magnetic flux density
also called the magnetic field density or magnetic induction
| tesla (T), or equivalently,
weber per square meter (Wb/m2)
|-
|rowspan=3 style="text-align: center" | C
| capacitance
| farad (F)
|-
| heat capacity
| joule per kelvin (J K−1), or equivalently, joule per degree Celsius (J °C−1)
|-
| constant of integration
| varied depending on context
|-
|rowspan=4 style="text-align: center" | c
| speed of light (in vacuum)
| 299,792,458 meter per second (m/s)
|-
| speed of sound
| 340.29 meter per second (m/s)
|-
| specific heat capacity
| joule per kilogram per kelvin (J kg−1 K−1), or equivalently, joule per kilogram per degree Celsius (J kg−1 °C−1)
|-
| viscous damping coefficient
| kilogram per second (kg/s)
|-
| style="text-align: center" |\mathbf
| electric displacement field
also called the electric flux density
| coulomb per square meter (C/m2)
|-
| style="text-align: center" |D
| density
| kilograms per cubic meter (kg/m3)
|-
|rowspan=4 style="text-align: center" |d
| distance
| meter (m)
|-
| impact parameter
| meter (m)
|-
| diameter
| meter (m)
|-
| differential (e.g. dx)
|
|-
| style="text-align: center" |d\mathbf
| differential vector element of surface area ''A'', with infinitesimally
small magnitude and direction normal to surface ''S''
| square meter (m2)
|-
| style="text-align: center" |dV
| differential element of volume ''V'' enclosed by surface ''S''
| cubic meter (m3)
|-
| style="text-align: center" |\mathbf
| electric field
| newton per coulomb (N C−1), or equivalently, volt per meter (V m−1)
|-
| style="text-align: center" | E
| energy
| joule (J)
|-
|rowspan=2 style="text-align: center" | e
| eccentricity
| unitless
|-
| 2.71828... (base of the natural logarithm), electron, elementary charge
|
|-
| style="text-align: center" |\mathbf
| force
| newton (N)
|-
|rowspan=3 style="text-align: center" | f
| frequency
| hertz (Hz)
|-
| function
|
|-
| friction
| newton (N)
|-
| style="text-align: center" |G
| the gravitational constant
| newton meter squared per kilogram squared (N m2/kg2)
|-
| style="text-align: center" | g
| acceleration due to gravity
| meter per second squared (m/s2), or equivalently, newton per kilogramme (N/kg)
|-
| style="text-align: center" |\mathbf
| magnetic field strength
also called just magnetic field
| ampere per meter (A/m)
|-
| style="text-align: center" |H
| Hamiltonian
| joule (J)
|-
| rowspan=2 style="text-align: center" | h
| height
| meter (m)
|-
| Planck's constant
| joule second (J s)
|-
| style="text-align: center" |\hbar
| reduced Planck's constant \textstyle \left ( }
| Cartesian x-axis basis unit vector
| unitless
|-
|rowspan=2 style="text-align: center" |\mathbf
| ''free'' current density,
not including polarization or magnetization currents bound in a material
| ampere per square meter (A/m2)
|-
| impulse
| kilogram meter per second (kg m/s)
|-
| style="text-align: center" |\mathbf}
| Cartesian z-axis basis unit vector
| unitless
|-
|rowspan=3 style="text-align: center" |L
| inductance
| henry (H)
|-
| luminosity
| watt (W)
|-
| angular momentum
| newton meter second (N m s or kg m2 s−1)
|-
| style="text-align: center" | l
| length
| meter (m)
|-
|rowspan=2 style="text-align: center" |M
| magnetization
| ampere per meter (A/m)
|-
| moment of force
often simply called moment or torque
| newton meter (N m)
|-
| style="text-align: center" |m
| mass
| kilogram (kg)
|-
|rowspan=2 style="text-align: center" |N
| normal vector
| unit varies depending on context
|-
| atomic number
| unitless
|-
|rowspan=2 style="text-align: center" |n
| refractive index
| unitless
|-
| principal quantum number
| unitless
|-
| style="text-align: center" |P
| power
| watt (W)
|-
|rowspan=2 style="text-align: center" |\mathbf
| momentum
| kilogram meter per second (kg m/s)
|-
| pressure
| pascal (Pa)
|-
|rowspan=2 style="text-align: center" |Q
| electric charge
| coulomb (C)
|-
| Heat
| joule (J)
|-
| style="text-align: center" |q
| electric charge
| coulomb (C)
|-
|rowspan=4 style="text-align: center" |R
| electrical resistance
| ohm (Ω)
|-
| Ricci tensor
| unitless
|-
| radiancy
|
|-
| gas constant
| joule per kilogramme kelvin (J/kgK)
|-
|style="text-align: center" |\mathbf
| radius vector (position)
| meter (m)
|-
|style="text-align: center" |r
| radius of rotation or distance between two things such as the masses in Newton's law of universal gravitation
| meter (m)
|-
|rowspan=3 style="text-align: center" | S
| surface area
| m2
|-
| entropy
| joule per kelvin (J/K)
|-
| action
|
|-
|rowspan=2 style="text-align: center" |s
| arc length
| meter (m)
|-
| displacement
|
|-
|rowspan=2 style="text-align: center" |T
| period
| second (s)
|-
| thermodynamic temperature
also called absolute temperature
| kelvin (K)
|-
| style="text-align: center" |t
| time
| second (s)
|-
| style="text-align: center" |\mathbf
| four-velocity
| meter per second (m/s)
|-
|rowspan=2 style="text-align: center" |U
| potential energy
| joule (J)
|-
| internal energy
| joule (J)
|-
|rowspan=2 style="text-align: center" |u
| relativistic mass
| kilogram (kg)
|-
| energy density
| joule per cubic meter (J/m3) or joule per kilogram (J/kg) depending on the context
|-
|rowspan=3 style="text-align: center" |V
| voltage
also called electric potential difference
| volt (V)
|-
| volume
| cubic meter (m3)
|-
| shear force
|
|-
| style="text-align: center" |\mathbf
| velocity
| meter per second (m/s)
|-
| style="text-align: center" | W
| mechanical work
| joule (J)
|-
| style="text-align: center" | w
| width
| meter (m)
|-
|rowspan=2 style="text-align: center" | x
| a generic unknown
| varied depending on context
|-
| displacement
| meter (m)
|-
| style="text-align: center" | Z
| electrical impedance
| ohm (Ω)
|}

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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